alt Hacker NewsIQ is about as heritable as body height.
> The results show that the heritability of IQ reaches an asymptote at about 0.80 at 18–20 years of age and continuing at that level well into adulthood.
https://www.cambridge.org/core/journals/twin-research-and-hu...
2013 is the phlogiston era of this science. Even the hereditarians hedge on the 0.80 claim now.